Internal-combustion engine.



S. B. D. HARDING.

INTERNAL GOMBUSTION ENGINE.

APPLIUATION FILED MAY 1, 1909.

Patented Ja.11.4, 1910.

INVENTOR.

. .G I a "lar/1111111 WTNESSES.

a. l L M. ,ww

UNITED STATES SHEBREN BRUCE DOUGLAStHARD-ING, OF LONDON, ENGLAND.

INTERNAL-COMBUSTION ENGINE. i

Specication of Letters Patent.

Application led May 1, 1909. Serial No. 493,432.

Patented Jan. 4, 1910.

To all whom it muy concern:

Be it known that I, SHERRENBRUCE Doue-` LAs HARDING, a subject-of the King of Great Britain and Ireland, residing at 50 Whitecross street, in the city and county of London, England, have invented a new and useful Improvement in Internal- Combustion Engines, of 'which the following is a full and complete specification.

This invention relates to internal combustion engines ol" the two-cycle rotary type, and it consists of the improved construction hereinafter more which has for its object inereaslng 4the eililciency of this type of engine. I attain this end in the manner illustrated in the laccompanying drawing in which the figure is a view in `longitudinal section.

' The-cylinder a is of the same diameter throughout and terminates at'one end in a crank-chamber e. The iston b working in the cylinder ais of ann ar form and is connected to two cranks d1 and d2 of the crankshaft d by two connecting rods e e. The second piston has a hollow trunk b1 which is o en to the back end of the cylinder, passes t rough'the annular piston b and is connected to the crank'ala' of the crank-shaft d by a connecting rod e1. The crank-chamber e Vis provided with suitable bearings c1 o1 for the crank-shaft d. The back end'of the cylinder a is closed b a plate carrying anextension forming a ollow axle fwhich runs in av bearing. Iz, carriedV by a bracket or block h1. Atthe other end of th'e cylinder, t'. e. beyond the extension forming the crankchamber, in a similar 'bracket or blockh in.

which is fixed a stud axle g which rojects toward the cylinder a and forms a caring ha on `which the cylindrical end c of the lcrank-chamber o takes a ,bearing. On the stud axle is vformed or fixed a bevel wheel with which a similar bevel wheel'z1 on the crank-shaft gears, so that the rotation of the shaft d imparts rotary motion tothe cylinder a.l In the trunk b1 of the piston bears a series of radially arranl edmlet ports 1:1, and in anextensron ba o? the piston b are a series of radially arranged ports Ivg-(the. arrangement of said ports being such that when the Vtwo .pistons b and b2 are at or about the ends of their outward .or working strokes the two sets of inlet Vports 7c and cl coincide and place the interior of the trunk b1 in communication with the combustion chamber between the two pistons. The exy ,thx port n in t particularly specified bearing at the back end haust ports Z which arelocated toward the back end of the cylinder a are uncovered by the piston o? as said piston reaches the end of. its outward or working-'stroke and are closed by said piston on its inward or return Stroke.

The explosive mixture is. drawn into the back end of the cylinderI c during the inner or return strokes of the pistons through ports m and n in the bracket or block 11.1 and the hollow axle f respectively, the location of 1e hollow axle f being such that it is open during the time the pistons are on their inward or return strokes. When the inlet ports and c coincide the charge compressed in the back end of by the piston b2 rushes into that part of the cylinder between the two pistons through 'said ports and drives the exhaust gases out through the exhaust ports l.' The exhaust ports open.into an expansion chamber Z which surrounds the cylinder a and is provided with a number of outlet holes l. This chamber can conveniently operate as a ily wheel.

On the exterior of the cylinder a are a series of ribs 0`-preferably longitudinally arranged--for radiatin purposes.` The charge may be xed 1n the cylinder vby anhelectric spark or by any other of the well-known methods and taken from the rotating or by suitable gearing.

What I claim as my invention and ,desire ,t0 secure by Letters Patent is l. An internal combustion engine of the two-cycle rotary type comprising a c linder terminating at one end in acrank-c amber and mounted in suitable longitudinally arranged bearings so that it can rotate about its axis', an annular iston working in said cylinder and coupledJ to the crank-shaft by a air of oppositcly dis ro s, a secondy piston working in said cylinder'and havng a hollow trunk `which is open to the back end of the through, the annular the power may be cylinder by a belt posed connecting iston, a single connectingl rod coupling said trunk to the crank- 1 shaft, a bevel lwheel carried by the crankshaft, a bevel wheel carried by the crankchamber and gearing with the bevel wheel on the crank-shaft, an inlet port through the of the cylinder and leading into said cylinder, ports 1n the trunk of the second piston and in an extension of the cylinder a cylinder and passes.

the annular piston which when they coincide put 4fthe back 'end ofth' cylinder .into coin-l muinication with the part of the cylinderbetween the two pistons, and-exhaust ports in the back endof the cylinder adapted to be opened and closed by the second piston.

2. A n internal combustion-engine of the two-cyclerotary type comprising a cylinder terminating at one end in' a crank-chamber- A VAand mounted 'in suitable longitudinally arranged bearings so that it can rotate 'aboutits axis, anannular piston working in said tothe back end of the cylinder and passes" cylinder and coupled to the crank-shaft by a pair of oppositely disposed connecting rods, asecond' piston working in said cylinder and having a hollow trunk which is open through the annular piston, al single connecting rod coupling said trunk to the crankshaft, a bevel wheel carried by the crankshaft, a bevel-*wheel carried bythe crankf chamber and gearing with the bevel wheel on the crank-shaft, an inlet port through the bearing at the back end of the cylinder and leading into said cylinder,.ports in the trunk of the second piston and in an extension of the annular piston'wh'ich when they coincide .f put the back end of the cylinder into -communicationwith the part of the cylinder between the two istons, exhaust ports in the back. end of t e cylinder adapted to be opened'and closed by the second piston, and

. an expansion chamber surrounding the cyli inder lnto which the exhaust ports open and having openings to the atmosphere.

3. An internal combustion engine of the 'y terminating at --one fend in a enanitand mountedi'nf suitable longitudinally arf,

twoy'cleirotary type comprisinga c C amber ranged bearings so that it can rotate about its axis, an annular piston working in said cylinder and coupled to the crank-shaft by a pair of oppositely disposed .connecting rods er and a second plston-working in saidgcylin having a hollow trunk which is openxto the I back end of'the cylinder and passesthrough the annular piston, a single connecting rod coupling said trunk tothe crank-shaft, av

bevel wheel carried by the crank-shaft, a bevel wheel carried by the crank-chamber and gearing with the gevel wheel on the crank-shaft, an inlet 'ort through the bearing at the back end o the cylinder and leadu ing into said cylinder', ports in the trunk of the second piston-and in an extension of the annular pistony which when they coincide put the back end. ofthev cylinder into corn-4 into which the exhaust ports open Vand hav-- in i openings to the atmosphere, and longituinally arranged ribs yon theexterior of the cylinder for radiatlng purposes.

Witnesses: u G. V. SYMEs,

A. MILLWARD Frison.

'susanna B11-UCE DOUGLAS alanine. 

